How To Update Macos High Sierra 10.13.6 To 10.15

Unplug printers, external hubs, USB drives (except backup drive), and even second monitors. Only keep your mouse, keyboard, and backup drive attached.

This method erases the hard drive, providing a fresh system free of legacy errors. It requires a USB flash drive (16GB minimum). how to update macos high sierra 10.13.6 to 10.15

You might discover that one essential piece of software won’t run, or you dislike the new Apple Music app compared to iTunes. Here’s your downgrade path. Unplug printers, external hubs, USB drives (except backup

Time Machine is your only safe way back: Warning: You cannot “go back” via a simple

Warning: You cannot “go back” via a simple Settings toggle. It requires a full erase and restore.

If you’re technically inclined and just want Mojave (10.14) instead of Catalina, you can download the Mojave installer from Apple’s website and repeat the process – but Mojave supports 32-bit apps until January 2024 security cutoff (already past as of now, but still functional).